Twin keels in the outside skin, good idea or unsafe ?
Sven Yrvind
At 86, Sven Yrvind is still pushing the limits of small-boat design. Discover the philosophy and technical grit behind his 'Exlex' series.
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In the comments some asked how I intended to attach the twin keels.
1986 I buildt my first boat of Divinycell and NM-epoxy.
She had a bow centerboard and a 150 kilo bronze shallow keel.
she was 4.8 meter long 15 feet. I sailed her from France to Ireland and then to Newfoundland.
I had screwed and glued the bronze keel to the outer laminate.
Many people were sceptical not only to my planned route but also to screwing the keel to the outside laminate.
Contemporary dogma then as now is to use keelbolts that traverse the hull to frames or ribs.
My method is much safer.
The engenering principle in structures is to spread out the load as much as possible.
Keelbolts do the opposite they concentrate the load bring it inside the boat then they try to spread it out with the helps of frames again.
My method is safer and more direct.
For more see Yrvind.com
There you can also support my project via Pay pal and Swish 0706 200 550
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